[ClusterLabs] Exception in adding resources to pacemaker

[Miroslav Lisik]

I'm forwarding this e-mail back to the users at clusterlabs.org mailing list.

On 9/25/24 10:26, 毕晓妍 wrote:
>
>
> The version of pcs is 0.10.8, and resources are added by batch calling 
> the pcs command through a script. First, each resource is created 
> using pcs resource create, and then pcs resource group add is executed 
> to create the group. The resources in the group include LVM, 
> Filesystem，IPaddr，pgsql。 The first 100+groups were added normally 
> through this method, but there were occasional exceptions where 
> resources could not be found. Is there a limit to the number of 
> resources added? Could it be that the large scale of XML has caused 
> this problem?
>

There is no limit on the number of resources added as Ken already wrote
earlier in the thread.

Are you getting the error message 'unable to find a
resource/clone/group' from the 'pcs resource group add' or different 
command?

Could you provide a snippet with executed commands and their output?
>
>
> 在 2024-09-25 01:56:39，"Miroslav Lisik" <mlisik at redhat.com> 写道：
> >Hello,
> >On 9/24/24 09:34, 毕晓妍 wrote:
> >> 你好：
> >> 我想请问一下pacemaker集群中添加的资源有数量上限吗？我在4节点集群中添加资源， 
> >> 一组5个资源， 
> >> 添加104组资源时，使用pcs命令添加没有任何报错，但是对组资源进行操作时显示unable 
> >> to find a resource/clone/group。请问是什么原因导致的这一现象？
> >>
> >> Hello,
> >>
> >> I would like to inquire about the potential limit on the quantity of 
> >> resources that can be added to a pacemaker cluster. Specifically, I've 
> >> been working with a 4-node cluster configuration, initially adding a 
> >> single group comprising 5 resources. However, upon attempting to 
> >> augment the cluster by adding 104 additional resource groups using the 
> >> |pcs| command, I encountered an unexpected behavior: while the command 
> >> execution itself did not report any errors, subsequent operations 
> >> targeting those groups resulted in a message stating 'unable to find a 
> >> resource/clone/group'.
> >>
> >This error from pcs means, that the resource id used with a pcs command
> >was not found in the CIB.
> >
> >Either a resource was not created or a resource id was mistyped in a pcs
> >command.
> >
> >The `pcs resource create` should error in case resource cannot be
> >created.
> >
> >How do you run pcs commands? Manually or by some script? Could you
> >provide more information like:
> >* version of pcs
> >* example of pcs commands used
> >* cluster configuration (CIB, output of pcs config...)
> >>
> >> Could you please shed some light on what might have caused this 
> >> phenomenon and whether there exists a known limitation with respect to 
> >> the total number of resources or resource groups that can be 
> >> effectively managed within a pacemaker cluster of this size?
> >>
> >> Looking forward to your reply.
> >>
> >>
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> >Regards,
> >Miroslav